1 // Copyright 2012 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "base/files/file_path.h"
6
7 #include <string.h>
8
9 #include <algorithm>
10
11 #include "base/check_op.h"
12 #include "base/files/safe_base_name.h"
13 #include "base/numerics/safe_conversions.h"
14 #include "base/pickle.h"
15 #include "base/ranges/algorithm.h"
16 #include "base/strings/strcat.h"
17 #include "base/strings/string_piece.h"
18 #include "base/strings/string_util.h"
19 #include "base/strings/sys_string_conversions.h"
20 #include "base/strings/utf_string_conversions.h"
21 #include "base/trace_event/base_tracing.h"
22
23 #if BUILDFLAG(IS_APPLE)
24 #include "base/mac/scoped_cftyperef.h"
25 #include "base/third_party/icu/icu_utf.h"
26 #endif
27
28 #if BUILDFLAG(IS_WIN)
29 #include <windows.h>
30 #include "base/win/win_util.h"
31 #elif BUILDFLAG(IS_APPLE)
32 #include <CoreFoundation/CoreFoundation.h>
33 #endif
34
35 namespace base {
36
37 using StringType = FilePath::StringType;
38 using StringPieceType = FilePath::StringPieceType;
39
40 namespace {
41
42 const char* const kCommonDoubleExtensionSuffixes[] = {
43 "bz", "bz2", "gz", "lz", "lzma", "lzo", "xz", "z", "zst"};
44 const char* const kCommonDoubleExtensions[] = {"user.js"};
45
46 const FilePath::CharType kStringTerminator = FILE_PATH_LITERAL('\0');
47
48 // If this FilePath contains a drive letter specification, returns the
49 // position of the last character of the drive letter specification,
50 // otherwise returns npos. This can only be true on Windows, when a pathname
51 // begins with a letter followed by a colon. On other platforms, this always
52 // returns npos.
FindDriveLetter(StringPieceType path)53 StringPieceType::size_type FindDriveLetter(StringPieceType path) {
54 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
55 // This is dependent on an ASCII-based character set, but that's a
56 // reasonable assumption. iswalpha can be too inclusive here.
57 if (path.length() >= 2 && path[1] == L':' &&
58 ((path[0] >= L'A' && path[0] <= L'Z') ||
59 (path[0] >= L'a' && path[0] <= L'z'))) {
60 return 1;
61 }
62 #endif // FILE_PATH_USES_DRIVE_LETTERS
63 return StringType::npos;
64 }
65
66 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
EqualDriveLetterCaseInsensitive(StringPieceType a,StringPieceType b)67 bool EqualDriveLetterCaseInsensitive(StringPieceType a, StringPieceType b) {
68 size_t a_letter_pos = FindDriveLetter(a);
69 size_t b_letter_pos = FindDriveLetter(b);
70
71 if (a_letter_pos == StringType::npos || b_letter_pos == StringType::npos)
72 return a == b;
73
74 StringPieceType a_letter(a.substr(0, a_letter_pos + 1));
75 StringPieceType b_letter(b.substr(0, b_letter_pos + 1));
76 if (!StartsWith(a_letter, b_letter, CompareCase::INSENSITIVE_ASCII))
77 return false;
78
79 StringPieceType a_rest(a.substr(a_letter_pos + 1));
80 StringPieceType b_rest(b.substr(b_letter_pos + 1));
81 return a_rest == b_rest;
82 }
83 #endif // defined(FILE_PATH_USES_DRIVE_LETTERS)
84
IsPathAbsolute(StringPieceType path)85 bool IsPathAbsolute(StringPieceType path) {
86 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
87 StringType::size_type letter = FindDriveLetter(path);
88 if (letter != StringType::npos) {
89 // Look for a separator right after the drive specification.
90 return path.length() > letter + 1 &&
91 FilePath::IsSeparator(path[letter + 1]);
92 }
93 // Look for a pair of leading separators.
94 return path.length() > 1 &&
95 FilePath::IsSeparator(path[0]) && FilePath::IsSeparator(path[1]);
96 #else // FILE_PATH_USES_DRIVE_LETTERS
97 // Look for a separator in the first position.
98 return path.length() > 0 && FilePath::IsSeparator(path[0]);
99 #endif // FILE_PATH_USES_DRIVE_LETTERS
100 }
101
AreAllSeparators(const StringType & input)102 bool AreAllSeparators(const StringType& input) {
103 for (auto it : input) {
104 if (!FilePath::IsSeparator(it))
105 return false;
106 }
107
108 return true;
109 }
110
111 // Find the position of the '.' that separates the extension from the rest
112 // of the file name. The position is relative to BaseName(), not value().
113 // Returns npos if it can't find an extension.
FinalExtensionSeparatorPosition(const StringType & path)114 StringType::size_type FinalExtensionSeparatorPosition(const StringType& path) {
115 // Special case "." and ".."
116 if (path == FilePath::kCurrentDirectory || path == FilePath::kParentDirectory)
117 return StringType::npos;
118
119 return path.rfind(FilePath::kExtensionSeparator);
120 }
121
122 // Same as above, but allow a second extension component of up to 4
123 // characters when the rightmost extension component is a common double
124 // extension (gz, bz2, Z). For example, foo.tar.gz or foo.tar.Z would have
125 // extension components of '.tar.gz' and '.tar.Z' respectively.
ExtensionSeparatorPosition(const StringType & path)126 StringType::size_type ExtensionSeparatorPosition(const StringType& path) {
127 const StringType::size_type last_dot = FinalExtensionSeparatorPosition(path);
128
129 // No extension, or the extension is the whole filename.
130 if (last_dot == StringType::npos || last_dot == 0U)
131 return last_dot;
132
133 const StringType::size_type penultimate_dot =
134 path.rfind(FilePath::kExtensionSeparator, last_dot - 1);
135 const StringType::size_type last_separator =
136 path.find_last_of(FilePath::kSeparators, last_dot - 1,
137 FilePath::kSeparatorsLength - 1);
138
139 if (penultimate_dot == StringType::npos ||
140 (last_separator != StringType::npos &&
141 penultimate_dot < last_separator)) {
142 return last_dot;
143 }
144
145 for (auto* i : kCommonDoubleExtensions) {
146 StringType extension(path, penultimate_dot + 1);
147 if (EqualsCaseInsensitiveASCII(extension, i))
148 return penultimate_dot;
149 }
150
151 StringType extension(path, last_dot + 1);
152 for (auto* i : kCommonDoubleExtensionSuffixes) {
153 if (EqualsCaseInsensitiveASCII(extension, i)) {
154 if ((last_dot - penultimate_dot) <= 5U &&
155 (last_dot - penultimate_dot) > 1U) {
156 return penultimate_dot;
157 }
158 }
159 }
160
161 return last_dot;
162 }
163
164 // Returns true if path is "", ".", or "..".
IsEmptyOrSpecialCase(const StringType & path)165 bool IsEmptyOrSpecialCase(const StringType& path) {
166 // Special cases "", ".", and ".."
167 if (path.empty() || path == FilePath::kCurrentDirectory ||
168 path == FilePath::kParentDirectory) {
169 return true;
170 }
171
172 return false;
173 }
174
175 } // namespace
176
177 FilePath::FilePath() = default;
178
179 FilePath::FilePath(const FilePath& that) = default;
180 FilePath::FilePath(FilePath&& that) noexcept = default;
181
FilePath(StringPieceType path)182 FilePath::FilePath(StringPieceType path) : path_(path) {
183 StringType::size_type nul_pos = path_.find(kStringTerminator);
184 if (nul_pos != StringType::npos)
185 path_.erase(nul_pos, StringType::npos);
186 }
187
188 FilePath::~FilePath() = default;
189
190 FilePath& FilePath::operator=(const FilePath& that) = default;
191
192 FilePath& FilePath::operator=(FilePath&& that) noexcept = default;
193
operator ==(const FilePath & that) const194 bool FilePath::operator==(const FilePath& that) const {
195 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
196 return EqualDriveLetterCaseInsensitive(this->path_, that.path_);
197 #else // defined(FILE_PATH_USES_DRIVE_LETTERS)
198 return path_ == that.path_;
199 #endif // defined(FILE_PATH_USES_DRIVE_LETTERS)
200 }
201
operator !=(const FilePath & that) const202 bool FilePath::operator!=(const FilePath& that) const {
203 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
204 return !EqualDriveLetterCaseInsensitive(this->path_, that.path_);
205 #else // defined(FILE_PATH_USES_DRIVE_LETTERS)
206 return path_ != that.path_;
207 #endif // defined(FILE_PATH_USES_DRIVE_LETTERS)
208 }
209
operator <<(std::ostream & out,const FilePath & file_path)210 std::ostream& operator<<(std::ostream& out, const FilePath& file_path) {
211 return out << file_path.value();
212 }
213
214 // static
IsSeparator(CharType character)215 bool FilePath::IsSeparator(CharType character) {
216 for (size_t i = 0; i < kSeparatorsLength - 1; ++i) {
217 if (character == kSeparators[i]) {
218 return true;
219 }
220 }
221
222 return false;
223 }
224
GetComponents() const225 std::vector<FilePath::StringType> FilePath::GetComponents() const {
226 std::vector<StringType> ret_val;
227 if (value().empty())
228 return ret_val;
229
230 FilePath current = *this;
231 FilePath base;
232
233 // Capture path components.
234 while (current != current.DirName()) {
235 base = current.BaseName();
236 if (!AreAllSeparators(base.value()))
237 ret_val.push_back(base.value());
238 current = current.DirName();
239 }
240
241 // Capture root, if any.
242 base = current.BaseName();
243 if (!base.value().empty() && base.value() != kCurrentDirectory)
244 ret_val.push_back(current.BaseName().value());
245
246 // Capture drive letter, if any.
247 FilePath dir = current.DirName();
248 StringType::size_type letter = FindDriveLetter(dir.value());
249 if (letter != StringType::npos)
250 ret_val.emplace_back(dir.value(), 0, letter + 1);
251
252 ranges::reverse(ret_val);
253 return ret_val;
254 }
255
IsParent(const FilePath & child) const256 bool FilePath::IsParent(const FilePath& child) const {
257 return AppendRelativePath(child, nullptr);
258 }
259
AppendRelativePath(const FilePath & child,FilePath * path) const260 bool FilePath::AppendRelativePath(const FilePath& child,
261 FilePath* path) const {
262 std::vector<StringType> parent_components = GetComponents();
263 std::vector<StringType> child_components = child.GetComponents();
264
265 if (parent_components.empty() ||
266 parent_components.size() >= child_components.size())
267 return false;
268
269 std::vector<StringType>::const_iterator parent_comp =
270 parent_components.begin();
271 std::vector<StringType>::const_iterator child_comp =
272 child_components.begin();
273
274 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
275 // Windows can access case sensitive filesystems, so component
276 // comparisions must be case sensitive, but drive letters are
277 // never case sensitive.
278 if ((FindDriveLetter(*parent_comp) != StringType::npos) &&
279 (FindDriveLetter(*child_comp) != StringType::npos)) {
280 if (!StartsWith(*parent_comp, *child_comp, CompareCase::INSENSITIVE_ASCII))
281 return false;
282 ++parent_comp;
283 ++child_comp;
284 }
285 #endif // defined(FILE_PATH_USES_DRIVE_LETTERS)
286
287 // The first 2 components for network paths are [<2-Separators>, <hostname>].
288 // Use case-insensitive comparison for the hostname.
289 // https://tools.ietf.org/html/rfc3986#section-3.2.2
290 if (IsNetwork() && parent_components.size() > 1) {
291 if (*parent_comp++ != *child_comp++ ||
292 !base::EqualsCaseInsensitiveASCII(*parent_comp++, *child_comp++)) {
293 return false;
294 }
295 }
296
297 while (parent_comp != parent_components.end()) {
298 if (*parent_comp != *child_comp)
299 return false;
300 ++parent_comp;
301 ++child_comp;
302 }
303
304 if (path != nullptr) {
305 for (; child_comp != child_components.end(); ++child_comp) {
306 *path = path->Append(*child_comp);
307 }
308 }
309 return true;
310 }
311
312 // libgen's dirname and basename aren't guaranteed to be thread-safe and aren't
313 // guaranteed to not modify their input strings, and in fact are implemented
314 // differently in this regard on different platforms. Don't use them, but
315 // adhere to their behavior.
DirName() const316 FilePath FilePath::DirName() const {
317 FilePath new_path(path_);
318 new_path.StripTrailingSeparatorsInternal();
319
320 // The drive letter, if any, always needs to remain in the output. If there
321 // is no drive letter, as will always be the case on platforms which do not
322 // support drive letters, letter will be npos, or -1, so the comparisons and
323 // resizes below using letter will still be valid.
324 StringType::size_type letter = FindDriveLetter(new_path.path_);
325
326 StringType::size_type last_separator =
327 new_path.path_.find_last_of(kSeparators, StringType::npos,
328 kSeparatorsLength - 1);
329 if (last_separator == StringType::npos) {
330 // path_ is in the current directory.
331 new_path.path_.resize(letter + 1);
332 } else if (last_separator == letter + 1) {
333 // path_ is in the root directory.
334 new_path.path_.resize(letter + 2);
335 } else if (last_separator == letter + 2 &&
336 IsSeparator(new_path.path_[letter + 1])) {
337 // path_ is in "//" (possibly with a drive letter); leave the double
338 // separator intact indicating alternate root.
339 new_path.path_.resize(letter + 3);
340 } else if (last_separator != 0) {
341 bool trim_to_basename = true;
342 #if BUILDFLAG(IS_POSIX)
343 // On Posix, more than two leading separators are always collapsed to one.
344 // See
345 // https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13
346 // So, do not strip any of the separators, let
347 // StripTrailingSeparatorsInternal() take care of the extra.
348 if (AreAllSeparators(new_path.path_.substr(0, last_separator + 1))) {
349 new_path.path_.resize(last_separator + 1);
350 trim_to_basename = false;
351 }
352 #endif // BUILDFLAG(IS_POSIX)
353 if (trim_to_basename) {
354 // path_ is somewhere else, trim the basename.
355 new_path.path_.resize(last_separator);
356 }
357 }
358
359 new_path.StripTrailingSeparatorsInternal();
360 if (!new_path.path_.length())
361 new_path.path_ = kCurrentDirectory;
362
363 return new_path;
364 }
365
BaseName() const366 FilePath FilePath::BaseName() const {
367 FilePath new_path(path_);
368 new_path.StripTrailingSeparatorsInternal();
369
370 // The drive letter, if any, is always stripped.
371 StringType::size_type letter = FindDriveLetter(new_path.path_);
372 if (letter != StringType::npos) {
373 new_path.path_.erase(0, letter + 1);
374 }
375
376 // Keep everything after the final separator, but if the pathname is only
377 // one character and it's a separator, leave it alone.
378 StringType::size_type last_separator =
379 new_path.path_.find_last_of(kSeparators, StringType::npos,
380 kSeparatorsLength - 1);
381 if (last_separator != StringType::npos &&
382 last_separator < new_path.path_.length() - 1) {
383 new_path.path_.erase(0, last_separator + 1);
384 }
385
386 return new_path;
387 }
388
Extension() const389 StringType FilePath::Extension() const {
390 FilePath base(BaseName());
391 const StringType::size_type dot = ExtensionSeparatorPosition(base.path_);
392 if (dot == StringType::npos)
393 return StringType();
394
395 return base.path_.substr(dot, StringType::npos);
396 }
397
FinalExtension() const398 StringType FilePath::FinalExtension() const {
399 FilePath base(BaseName());
400 const StringType::size_type dot = FinalExtensionSeparatorPosition(base.path_);
401 if (dot == StringType::npos)
402 return StringType();
403
404 return base.path_.substr(dot, StringType::npos);
405 }
406
RemoveExtension() const407 FilePath FilePath::RemoveExtension() const {
408 if (Extension().empty())
409 return *this;
410
411 const StringType::size_type dot = ExtensionSeparatorPosition(path_);
412 if (dot == StringType::npos)
413 return *this;
414
415 return FilePath(path_.substr(0, dot));
416 }
417
RemoveFinalExtension() const418 FilePath FilePath::RemoveFinalExtension() const {
419 if (FinalExtension().empty())
420 return *this;
421
422 const StringType::size_type dot = FinalExtensionSeparatorPosition(path_);
423 if (dot == StringType::npos)
424 return *this;
425
426 return FilePath(path_.substr(0, dot));
427 }
428
InsertBeforeExtension(StringPieceType suffix) const429 FilePath FilePath::InsertBeforeExtension(StringPieceType suffix) const {
430 if (suffix.empty())
431 return FilePath(path_);
432
433 if (IsEmptyOrSpecialCase(BaseName().value()))
434 return FilePath();
435
436 return FilePath(
437 base::StrCat({RemoveExtension().value(), suffix, Extension()}));
438 }
439
InsertBeforeExtensionASCII(StringPiece suffix) const440 FilePath FilePath::InsertBeforeExtensionASCII(StringPiece suffix)
441 const {
442 DCHECK(IsStringASCII(suffix));
443 #if BUILDFLAG(IS_WIN)
444 return InsertBeforeExtension(UTF8ToWide(suffix));
445 #elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
446 return InsertBeforeExtension(suffix);
447 #endif
448 }
449
AddExtension(StringPieceType extension) const450 FilePath FilePath::AddExtension(StringPieceType extension) const {
451 if (IsEmptyOrSpecialCase(BaseName().value()))
452 return FilePath();
453
454 // If the new extension is "" or ".", then just return the current FilePath.
455 if (extension.empty() ||
456 (extension.size() == 1 && extension[0] == kExtensionSeparator))
457 return *this;
458
459 StringType str = path_;
460 if (extension[0] != kExtensionSeparator &&
461 *(str.end() - 1) != kExtensionSeparator) {
462 str.append(1, kExtensionSeparator);
463 }
464 str.append(extension.data(), extension.size());
465 return FilePath(str);
466 }
467
AddExtensionASCII(StringPiece extension) const468 FilePath FilePath::AddExtensionASCII(StringPiece extension) const {
469 DCHECK(IsStringASCII(extension));
470 #if BUILDFLAG(IS_WIN)
471 return AddExtension(UTF8ToWide(extension));
472 #elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
473 return AddExtension(extension);
474 #endif
475 }
476
ReplaceExtension(StringPieceType extension) const477 FilePath FilePath::ReplaceExtension(StringPieceType extension) const {
478 if (IsEmptyOrSpecialCase(BaseName().value()))
479 return FilePath();
480
481 FilePath no_ext = RemoveExtension();
482 // If the new extension is "" or ".", then just remove the current extension.
483 if (extension.empty() ||
484 (extension.size() == 1 && extension[0] == kExtensionSeparator))
485 return no_ext;
486
487 StringType str = no_ext.value();
488 if (extension[0] != kExtensionSeparator)
489 str.append(1, kExtensionSeparator);
490 str.append(extension.data(), extension.size());
491 return FilePath(str);
492 }
493
MatchesExtension(StringPieceType extension) const494 bool FilePath::MatchesExtension(StringPieceType extension) const {
495 DCHECK(extension.empty() || extension[0] == kExtensionSeparator);
496
497 StringType current_extension = Extension();
498
499 if (current_extension.length() != extension.length())
500 return false;
501
502 return FilePath::CompareEqualIgnoreCase(extension, current_extension);
503 }
504
MatchesFinalExtension(StringPieceType extension) const505 bool FilePath::MatchesFinalExtension(StringPieceType extension) const {
506 DCHECK(extension.empty() || extension[0] == kExtensionSeparator);
507
508 StringType current_final_extension = FinalExtension();
509
510 if (current_final_extension.length() != extension.length())
511 return false;
512
513 return FilePath::CompareEqualIgnoreCase(extension, current_final_extension);
514 }
515
Append(StringPieceType component) const516 FilePath FilePath::Append(StringPieceType component) const {
517 StringPieceType appended = component;
518 StringType without_nuls;
519
520 StringType::size_type nul_pos = component.find(kStringTerminator);
521 if (nul_pos != StringPieceType::npos) {
522 without_nuls = StringType(component.substr(0, nul_pos));
523 appended = StringPieceType(without_nuls);
524 }
525
526 DCHECK(!IsPathAbsolute(appended));
527
528 if (path_.compare(kCurrentDirectory) == 0 && !appended.empty()) {
529 // Append normally doesn't do any normalization, but as a special case,
530 // when appending to kCurrentDirectory, just return a new path for the
531 // component argument. Appending component to kCurrentDirectory would
532 // serve no purpose other than needlessly lengthening the path, and
533 // it's likely in practice to wind up with FilePath objects containing
534 // only kCurrentDirectory when calling DirName on a single relative path
535 // component.
536 return FilePath(appended);
537 }
538
539 FilePath new_path(path_);
540 new_path.StripTrailingSeparatorsInternal();
541
542 // Don't append a separator if the path is empty (indicating the current
543 // directory) or if the path component is empty (indicating nothing to
544 // append).
545 if (!appended.empty() && !new_path.path_.empty()) {
546 // Don't append a separator if the path still ends with a trailing
547 // separator after stripping (indicating the root directory).
548 if (!IsSeparator(new_path.path_.back())) {
549 // Don't append a separator if the path is just a drive letter.
550 if (FindDriveLetter(new_path.path_) + 1 != new_path.path_.length()) {
551 new_path.path_.append(1, kSeparators[0]);
552 }
553 }
554 }
555
556 new_path.path_.append(appended.data(), appended.size());
557 return new_path;
558 }
559
Append(const FilePath & component) const560 FilePath FilePath::Append(const FilePath& component) const {
561 return Append(component.value());
562 }
563
Append(const SafeBaseName & component) const564 FilePath FilePath::Append(const SafeBaseName& component) const {
565 return Append(component.path().value());
566 }
567
AppendASCII(StringPiece component) const568 FilePath FilePath::AppendASCII(StringPiece component) const {
569 DCHECK(base::IsStringASCII(component));
570 #if BUILDFLAG(IS_WIN)
571 return Append(UTF8ToWide(component));
572 #elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
573 return Append(component);
574 #endif
575 }
576
IsAbsolute() const577 bool FilePath::IsAbsolute() const {
578 return IsPathAbsolute(path_);
579 }
580
IsNetwork() const581 bool FilePath::IsNetwork() const {
582 return path_.length() > 1 && FilePath::IsSeparator(path_[0]) &&
583 FilePath::IsSeparator(path_[1]);
584 }
585
EndsWithSeparator() const586 bool FilePath::EndsWithSeparator() const {
587 if (empty())
588 return false;
589 return IsSeparator(path_.back());
590 }
591
AsEndingWithSeparator() const592 FilePath FilePath::AsEndingWithSeparator() const {
593 if (EndsWithSeparator() || path_.empty())
594 return *this;
595
596 StringType path_str;
597 path_str.reserve(path_.length() + 1); // Only allocate string once.
598
599 path_str = path_;
600 path_str.append(&kSeparators[0], 1);
601 return FilePath(path_str);
602 }
603
StripTrailingSeparators() const604 FilePath FilePath::StripTrailingSeparators() const {
605 FilePath new_path(path_);
606 new_path.StripTrailingSeparatorsInternal();
607
608 return new_path;
609 }
610
ReferencesParent() const611 bool FilePath::ReferencesParent() const {
612 if (path_.find(kParentDirectory) == StringType::npos) {
613 // GetComponents is quite expensive, so avoid calling it in the majority
614 // of cases where there isn't a kParentDirectory anywhere in the path.
615 return false;
616 }
617
618 std::vector<StringType> components = GetComponents();
619 std::vector<StringType>::const_iterator it = components.begin();
620 for (; it != components.end(); ++it) {
621 const StringType& component = *it;
622 // Windows has odd, undocumented behavior with path components containing
623 // only whitespace and . characters. So, if all we see is . and
624 // whitespace, then we treat any .. sequence as referencing parent.
625 // For simplicity we enforce this on all platforms.
626 if (component.find_first_not_of(FILE_PATH_LITERAL(". \n\r\t")) ==
627 std::string::npos &&
628 component.find(kParentDirectory) != std::string::npos) {
629 return true;
630 }
631 }
632 return false;
633 }
634
635 #if BUILDFLAG(IS_WIN)
636
LossyDisplayName() const637 std::u16string FilePath::LossyDisplayName() const {
638 return AsString16(path_);
639 }
640
MaybeAsASCII() const641 std::string FilePath::MaybeAsASCII() const {
642 return base::IsStringASCII(path_) ? WideToASCII(path_) : std::string();
643 }
644
AsUTF8Unsafe() const645 std::string FilePath::AsUTF8Unsafe() const {
646 return WideToUTF8(value());
647 }
648
AsUTF16Unsafe() const649 std::u16string FilePath::AsUTF16Unsafe() const {
650 return WideToUTF16(value());
651 }
652
653 // static
FromASCII(StringPiece ascii)654 FilePath FilePath::FromASCII(StringPiece ascii) {
655 DCHECK(base::IsStringASCII(ascii));
656 return FilePath(ASCIIToWide(ascii));
657 }
658
659 // static
FromUTF8Unsafe(StringPiece utf8)660 FilePath FilePath::FromUTF8Unsafe(StringPiece utf8) {
661 return FilePath(UTF8ToWide(utf8));
662 }
663
664 // static
FromUTF16Unsafe(StringPiece16 utf16)665 FilePath FilePath::FromUTF16Unsafe(StringPiece16 utf16) {
666 return FilePath(AsWStringPiece(utf16));
667 }
668
669 #elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
670
671 // See file_path.h for a discussion of the encoding of paths on POSIX
672 // platforms. These encoding conversion functions are not quite correct.
673
LossyDisplayName() const674 std::u16string FilePath::LossyDisplayName() const {
675 return WideToUTF16(SysNativeMBToWide(path_));
676 }
677
MaybeAsASCII() const678 std::string FilePath::MaybeAsASCII() const {
679 if (base::IsStringASCII(path_))
680 return path_;
681 return std::string();
682 }
683
AsUTF8Unsafe() const684 std::string FilePath::AsUTF8Unsafe() const {
685 #if defined(SYSTEM_NATIVE_UTF8)
686 return value();
687 #else
688 return WideToUTF8(SysNativeMBToWide(value()));
689 #endif
690 }
691
AsUTF16Unsafe() const692 std::u16string FilePath::AsUTF16Unsafe() const {
693 #if defined(SYSTEM_NATIVE_UTF8)
694 return UTF8ToUTF16(value());
695 #else
696 return WideToUTF16(SysNativeMBToWide(value()));
697 #endif
698 }
699
700 // static
FromASCII(StringPiece ascii)701 FilePath FilePath::FromASCII(StringPiece ascii) {
702 DCHECK(base::IsStringASCII(ascii));
703 return FilePath(ascii);
704 }
705
706 // static
FromUTF8Unsafe(StringPiece utf8)707 FilePath FilePath::FromUTF8Unsafe(StringPiece utf8) {
708 #if defined(SYSTEM_NATIVE_UTF8)
709 return FilePath(utf8);
710 #else
711 return FilePath(SysWideToNativeMB(UTF8ToWide(utf8)));
712 #endif
713 }
714
715 // static
FromUTF16Unsafe(StringPiece16 utf16)716 FilePath FilePath::FromUTF16Unsafe(StringPiece16 utf16) {
717 #if defined(SYSTEM_NATIVE_UTF8)
718 return FilePath(UTF16ToUTF8(utf16));
719 #else
720 return FilePath(SysWideToNativeMB(UTF16ToWide(utf16)));
721 #endif
722 }
723
724 #endif // BUILDFLAG(IS_WIN)
725
WriteToPickle(Pickle * pickle) const726 void FilePath::WriteToPickle(Pickle* pickle) const {
727 #if BUILDFLAG(IS_WIN)
728 pickle->WriteString16(AsStringPiece16(path_));
729 #elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
730 pickle->WriteString(path_);
731 #else
732 #error Unsupported platform
733 #endif
734 }
735
ReadFromPickle(PickleIterator * iter)736 bool FilePath::ReadFromPickle(PickleIterator* iter) {
737 #if BUILDFLAG(IS_WIN)
738 std::u16string path;
739 if (!iter->ReadString16(&path))
740 return false;
741 path_ = UTF16ToWide(path);
742 #elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
743 if (!iter->ReadString(&path_))
744 return false;
745 #else
746 #error Unsupported platform
747 #endif
748
749 if (path_.find(kStringTerminator) != StringType::npos)
750 return false;
751
752 return true;
753 }
754
755 #if BUILDFLAG(IS_WIN)
756 // Windows specific implementation of file string comparisons.
757
CompareIgnoreCase(StringPieceType string1,StringPieceType string2)758 int FilePath::CompareIgnoreCase(StringPieceType string1,
759 StringPieceType string2) {
760 // CharUpperW within user32 is used here because it will provide unicode
761 // conversions regardless of locale. The STL alternative, towupper, has a
762 // locale consideration that prevents it from converting all characters by
763 // default.
764 CHECK(win::IsUser32AndGdi32Available());
765 // Perform character-wise upper case comparison rather than using the
766 // fully Unicode-aware CompareString(). For details see:
767 // http://blogs.msdn.com/michkap/archive/2005/10/17/481600.aspx
768 StringPieceType::const_iterator i1 = string1.begin();
769 StringPieceType::const_iterator i2 = string2.begin();
770 StringPieceType::const_iterator string1end = string1.end();
771 StringPieceType::const_iterator string2end = string2.end();
772 for ( ; i1 != string1end && i2 != string2end; ++i1, ++i2) {
773 wchar_t c1 =
774 (wchar_t)LOWORD(::CharUpperW((LPWSTR)(DWORD_PTR)MAKELONG(*i1, 0)));
775 wchar_t c2 =
776 (wchar_t)LOWORD(::CharUpperW((LPWSTR)(DWORD_PTR)MAKELONG(*i2, 0)));
777 if (c1 < c2)
778 return -1;
779 if (c1 > c2)
780 return 1;
781 }
782 if (i1 != string1end)
783 return 1;
784 if (i2 != string2end)
785 return -1;
786 return 0;
787 }
788
789 #elif BUILDFLAG(IS_APPLE)
790 // Mac OS X specific implementation of file string comparisons.
791
792 // cf. https://developer.apple.com/library/archive/technotes/tn/tn1150.html#UnicodeSubtleties
793 //
794 // "When using CreateTextEncoding to create a text encoding, you should set
795 // the TextEncodingBase to kTextEncodingUnicodeV2_0, set the
796 // TextEncodingVariant to kUnicodeCanonicalDecompVariant, and set the
797 // TextEncodingFormat to kUnicode16BitFormat. Using these values ensures that
798 // the Unicode will be in the same form as on an HFS Plus volume, even as the
799 // Unicode standard evolves."
800 //
801 // Another technical article for X 10.4 updates this: one should use
802 // the new (unambiguous) kUnicodeHFSPlusDecompVariant.
803 // cf. http://developer.apple.com/mac/library/releasenotes/TextFonts/RN-TEC/index.html
804 //
805 // This implementation uses CFStringGetFileSystemRepresentation() to get the
806 // decomposed form, and an adapted version of the FastUnicodeCompare as
807 // described in the tech note to compare the strings.
808
809 // Character conversion table for FastUnicodeCompare()
810 //
811 // The lower case table consists of a 256-entry high-byte table followed by
812 // some number of 256-entry subtables. The high-byte table contains either an
813 // offset to the subtable for characters with that high byte or zero, which
814 // means that there are no case mappings or ignored characters in that block.
815 // Ignored characters are mapped to zero.
816 //
817 // cf. downloadable file linked in
818 // https://developer.apple.com/library/archive/technotes/tn/tn1150.html#Downloads
819
820 namespace {
821
822 // clang-format off
823 const UInt16 lower_case_table[11 * 256] = {
824 // High-byte indices ( == 0 iff no case mapping and no ignorables )
825
826 /* 0 */ 0x0100, 0x0200, 0x0000, 0x0300, 0x0400, 0x0500, 0x0000, 0x0000,
827 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
828 /* 1 */ 0x0600, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
829 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
830 /* 2 */ 0x0700, 0x0800, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
831 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
832 /* 3 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
833 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
834 /* 4 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
835 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
836 /* 5 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
837 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
838 /* 6 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
839 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
840 /* 7 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
841 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
842 /* 8 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
843 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
844 /* 9 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
845 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
846 /* A */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
847 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
848 /* B */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
849 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
850 /* C */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
851 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
852 /* D */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
853 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
854 /* E */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
855 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
856 /* F */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
857 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0900, 0x0A00,
858
859 // Table 1 (for high byte 0x00)
860
861 /* 0 */ 0xFFFF, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
862 0x0008, 0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x000E, 0x000F,
863 /* 1 */ 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
864 0x0018, 0x0019, 0x001A, 0x001B, 0x001C, 0x001D, 0x001E, 0x001F,
865 /* 2 */ 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
866 0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F,
867 /* 3 */ 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
868 0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E, 0x003F,
869 /* 4 */ 0x0040, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
870 0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F,
871 /* 5 */ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
872 0x0078, 0x0079, 0x007A, 0x005B, 0x005C, 0x005D, 0x005E, 0x005F,
873 /* 6 */ 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
874 0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F,
875 /* 7 */ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
876 0x0078, 0x0079, 0x007A, 0x007B, 0x007C, 0x007D, 0x007E, 0x007F,
877 /* 8 */ 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
878 0x0088, 0x0089, 0x008A, 0x008B, 0x008C, 0x008D, 0x008E, 0x008F,
879 /* 9 */ 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
880 0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F,
881 /* A */ 0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7,
882 0x00A8, 0x00A9, 0x00AA, 0x00AB, 0x00AC, 0x00AD, 0x00AE, 0x00AF,
883 /* B */ 0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7,
884 0x00B8, 0x00B9, 0x00BA, 0x00BB, 0x00BC, 0x00BD, 0x00BE, 0x00BF,
885 /* C */ 0x00C0, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00E6, 0x00C7,
886 0x00C8, 0x00C9, 0x00CA, 0x00CB, 0x00CC, 0x00CD, 0x00CE, 0x00CF,
887 /* D */ 0x00F0, 0x00D1, 0x00D2, 0x00D3, 0x00D4, 0x00D5, 0x00D6, 0x00D7,
888 0x00F8, 0x00D9, 0x00DA, 0x00DB, 0x00DC, 0x00DD, 0x00FE, 0x00DF,
889 /* E */ 0x00E0, 0x00E1, 0x00E2, 0x00E3, 0x00E4, 0x00E5, 0x00E6, 0x00E7,
890 0x00E8, 0x00E9, 0x00EA, 0x00EB, 0x00EC, 0x00ED, 0x00EE, 0x00EF,
891 /* F */ 0x00F0, 0x00F1, 0x00F2, 0x00F3, 0x00F4, 0x00F5, 0x00F6, 0x00F7,
892 0x00F8, 0x00F9, 0x00FA, 0x00FB, 0x00FC, 0x00FD, 0x00FE, 0x00FF,
893
894 // Table 2 (for high byte 0x01)
895
896 /* 0 */ 0x0100, 0x0101, 0x0102, 0x0103, 0x0104, 0x0105, 0x0106, 0x0107,
897 0x0108, 0x0109, 0x010A, 0x010B, 0x010C, 0x010D, 0x010E, 0x010F,
898 /* 1 */ 0x0111, 0x0111, 0x0112, 0x0113, 0x0114, 0x0115, 0x0116, 0x0117,
899 0x0118, 0x0119, 0x011A, 0x011B, 0x011C, 0x011D, 0x011E, 0x011F,
900 /* 2 */ 0x0120, 0x0121, 0x0122, 0x0123, 0x0124, 0x0125, 0x0127, 0x0127,
901 0x0128, 0x0129, 0x012A, 0x012B, 0x012C, 0x012D, 0x012E, 0x012F,
902 /* 3 */ 0x0130, 0x0131, 0x0133, 0x0133, 0x0134, 0x0135, 0x0136, 0x0137,
903 0x0138, 0x0139, 0x013A, 0x013B, 0x013C, 0x013D, 0x013E, 0x0140,
904 /* 4 */ 0x0140, 0x0142, 0x0142, 0x0143, 0x0144, 0x0145, 0x0146, 0x0147,
905 0x0148, 0x0149, 0x014B, 0x014B, 0x014C, 0x014D, 0x014E, 0x014F,
906 /* 5 */ 0x0150, 0x0151, 0x0153, 0x0153, 0x0154, 0x0155, 0x0156, 0x0157,
907 0x0158, 0x0159, 0x015A, 0x015B, 0x015C, 0x015D, 0x015E, 0x015F,
908 /* 6 */ 0x0160, 0x0161, 0x0162, 0x0163, 0x0164, 0x0165, 0x0167, 0x0167,
909 0x0168, 0x0169, 0x016A, 0x016B, 0x016C, 0x016D, 0x016E, 0x016F,
910 /* 7 */ 0x0170, 0x0171, 0x0172, 0x0173, 0x0174, 0x0175, 0x0176, 0x0177,
911 0x0178, 0x0179, 0x017A, 0x017B, 0x017C, 0x017D, 0x017E, 0x017F,
912 /* 8 */ 0x0180, 0x0253, 0x0183, 0x0183, 0x0185, 0x0185, 0x0254, 0x0188,
913 0x0188, 0x0256, 0x0257, 0x018C, 0x018C, 0x018D, 0x01DD, 0x0259,
914 /* 9 */ 0x025B, 0x0192, 0x0192, 0x0260, 0x0263, 0x0195, 0x0269, 0x0268,
915 0x0199, 0x0199, 0x019A, 0x019B, 0x026F, 0x0272, 0x019E, 0x0275,
916 /* A */ 0x01A0, 0x01A1, 0x01A3, 0x01A3, 0x01A5, 0x01A5, 0x01A6, 0x01A8,
917 0x01A8, 0x0283, 0x01AA, 0x01AB, 0x01AD, 0x01AD, 0x0288, 0x01AF,
918 /* B */ 0x01B0, 0x028A, 0x028B, 0x01B4, 0x01B4, 0x01B6, 0x01B6, 0x0292,
919 0x01B9, 0x01B9, 0x01BA, 0x01BB, 0x01BD, 0x01BD, 0x01BE, 0x01BF,
920 /* C */ 0x01C0, 0x01C1, 0x01C2, 0x01C3, 0x01C6, 0x01C6, 0x01C6, 0x01C9,
921 0x01C9, 0x01C9, 0x01CC, 0x01CC, 0x01CC, 0x01CD, 0x01CE, 0x01CF,
922 /* D */ 0x01D0, 0x01D1, 0x01D2, 0x01D3, 0x01D4, 0x01D5, 0x01D6, 0x01D7,
923 0x01D8, 0x01D9, 0x01DA, 0x01DB, 0x01DC, 0x01DD, 0x01DE, 0x01DF,
924 /* E */ 0x01E0, 0x01E1, 0x01E2, 0x01E3, 0x01E5, 0x01E5, 0x01E6, 0x01E7,
925 0x01E8, 0x01E9, 0x01EA, 0x01EB, 0x01EC, 0x01ED, 0x01EE, 0x01EF,
926 /* F */ 0x01F0, 0x01F3, 0x01F3, 0x01F3, 0x01F4, 0x01F5, 0x01F6, 0x01F7,
927 0x01F8, 0x01F9, 0x01FA, 0x01FB, 0x01FC, 0x01FD, 0x01FE, 0x01FF,
928
929 // Table 3 (for high byte 0x03)
930
931 /* 0 */ 0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307,
932 0x0308, 0x0309, 0x030A, 0x030B, 0x030C, 0x030D, 0x030E, 0x030F,
933 /* 1 */ 0x0310, 0x0311, 0x0312, 0x0313, 0x0314, 0x0315, 0x0316, 0x0317,
934 0x0318, 0x0319, 0x031A, 0x031B, 0x031C, 0x031D, 0x031E, 0x031F,
935 /* 2 */ 0x0320, 0x0321, 0x0322, 0x0323, 0x0324, 0x0325, 0x0326, 0x0327,
936 0x0328, 0x0329, 0x032A, 0x032B, 0x032C, 0x032D, 0x032E, 0x032F,
937 /* 3 */ 0x0330, 0x0331, 0x0332, 0x0333, 0x0334, 0x0335, 0x0336, 0x0337,
938 0x0338, 0x0339, 0x033A, 0x033B, 0x033C, 0x033D, 0x033E, 0x033F,
939 /* 4 */ 0x0340, 0x0341, 0x0342, 0x0343, 0x0344, 0x0345, 0x0346, 0x0347,
940 0x0348, 0x0349, 0x034A, 0x034B, 0x034C, 0x034D, 0x034E, 0x034F,
941 /* 5 */ 0x0350, 0x0351, 0x0352, 0x0353, 0x0354, 0x0355, 0x0356, 0x0357,
942 0x0358, 0x0359, 0x035A, 0x035B, 0x035C, 0x035D, 0x035E, 0x035F,
943 /* 6 */ 0x0360, 0x0361, 0x0362, 0x0363, 0x0364, 0x0365, 0x0366, 0x0367,
944 0x0368, 0x0369, 0x036A, 0x036B, 0x036C, 0x036D, 0x036E, 0x036F,
945 /* 7 */ 0x0370, 0x0371, 0x0372, 0x0373, 0x0374, 0x0375, 0x0376, 0x0377,
946 0x0378, 0x0379, 0x037A, 0x037B, 0x037C, 0x037D, 0x037E, 0x037F,
947 /* 8 */ 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386, 0x0387,
948 0x0388, 0x0389, 0x038A, 0x038B, 0x038C, 0x038D, 0x038E, 0x038F,
949 /* 9 */ 0x0390, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7,
950 0x03B8, 0x03B9, 0x03BA, 0x03BB, 0x03BC, 0x03BD, 0x03BE, 0x03BF,
951 /* A */ 0x03C0, 0x03C1, 0x03A2, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7,
952 0x03C8, 0x03C9, 0x03AA, 0x03AB, 0x03AC, 0x03AD, 0x03AE, 0x03AF,
953 /* B */ 0x03B0, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7,
954 0x03B8, 0x03B9, 0x03BA, 0x03BB, 0x03BC, 0x03BD, 0x03BE, 0x03BF,
955 /* C */ 0x03C0, 0x03C1, 0x03C2, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7,
956 0x03C8, 0x03C9, 0x03CA, 0x03CB, 0x03CC, 0x03CD, 0x03CE, 0x03CF,
957 /* D */ 0x03D0, 0x03D1, 0x03D2, 0x03D3, 0x03D4, 0x03D5, 0x03D6, 0x03D7,
958 0x03D8, 0x03D9, 0x03DA, 0x03DB, 0x03DC, 0x03DD, 0x03DE, 0x03DF,
959 /* E */ 0x03E0, 0x03E1, 0x03E3, 0x03E3, 0x03E5, 0x03E5, 0x03E7, 0x03E7,
960 0x03E9, 0x03E9, 0x03EB, 0x03EB, 0x03ED, 0x03ED, 0x03EF, 0x03EF,
961 /* F */ 0x03F0, 0x03F1, 0x03F2, 0x03F3, 0x03F4, 0x03F5, 0x03F6, 0x03F7,
962 0x03F8, 0x03F9, 0x03FA, 0x03FB, 0x03FC, 0x03FD, 0x03FE, 0x03FF,
963
964 // Table 4 (for high byte 0x04)
965
966 /* 0 */ 0x0400, 0x0401, 0x0452, 0x0403, 0x0454, 0x0455, 0x0456, 0x0407,
967 0x0458, 0x0459, 0x045A, 0x045B, 0x040C, 0x040D, 0x040E, 0x045F,
968 /* 1 */ 0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
969 0x0438, 0x0419, 0x043A, 0x043B, 0x043C, 0x043D, 0x043E, 0x043F,
970 /* 2 */ 0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
971 0x0448, 0x0449, 0x044A, 0x044B, 0x044C, 0x044D, 0x044E, 0x044F,
972 /* 3 */ 0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
973 0x0438, 0x0439, 0x043A, 0x043B, 0x043C, 0x043D, 0x043E, 0x043F,
974 /* 4 */ 0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
975 0x0448, 0x0449, 0x044A, 0x044B, 0x044C, 0x044D, 0x044E, 0x044F,
976 /* 5 */ 0x0450, 0x0451, 0x0452, 0x0453, 0x0454, 0x0455, 0x0456, 0x0457,
977 0x0458, 0x0459, 0x045A, 0x045B, 0x045C, 0x045D, 0x045E, 0x045F,
978 /* 6 */ 0x0461, 0x0461, 0x0463, 0x0463, 0x0465, 0x0465, 0x0467, 0x0467,
979 0x0469, 0x0469, 0x046B, 0x046B, 0x046D, 0x046D, 0x046F, 0x046F,
980 /* 7 */ 0x0471, 0x0471, 0x0473, 0x0473, 0x0475, 0x0475, 0x0476, 0x0477,
981 0x0479, 0x0479, 0x047B, 0x047B, 0x047D, 0x047D, 0x047F, 0x047F,
982 /* 8 */ 0x0481, 0x0481, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x0487,
983 0x0488, 0x0489, 0x048A, 0x048B, 0x048C, 0x048D, 0x048E, 0x048F,
984 /* 9 */ 0x0491, 0x0491, 0x0493, 0x0493, 0x0495, 0x0495, 0x0497, 0x0497,
985 0x0499, 0x0499, 0x049B, 0x049B, 0x049D, 0x049D, 0x049F, 0x049F,
986 /* A */ 0x04A1, 0x04A1, 0x04A3, 0x04A3, 0x04A5, 0x04A5, 0x04A7, 0x04A7,
987 0x04A9, 0x04A9, 0x04AB, 0x04AB, 0x04AD, 0x04AD, 0x04AF, 0x04AF,
988 /* B */ 0x04B1, 0x04B1, 0x04B3, 0x04B3, 0x04B5, 0x04B5, 0x04B7, 0x04B7,
989 0x04B9, 0x04B9, 0x04BB, 0x04BB, 0x04BD, 0x04BD, 0x04BF, 0x04BF,
990 /* C */ 0x04C0, 0x04C1, 0x04C2, 0x04C4, 0x04C4, 0x04C5, 0x04C6, 0x04C8,
991 0x04C8, 0x04C9, 0x04CA, 0x04CC, 0x04CC, 0x04CD, 0x04CE, 0x04CF,
992 /* D */ 0x04D0, 0x04D1, 0x04D2, 0x04D3, 0x04D4, 0x04D5, 0x04D6, 0x04D7,
993 0x04D8, 0x04D9, 0x04DA, 0x04DB, 0x04DC, 0x04DD, 0x04DE, 0x04DF,
994 /* E */ 0x04E0, 0x04E1, 0x04E2, 0x04E3, 0x04E4, 0x04E5, 0x04E6, 0x04E7,
995 0x04E8, 0x04E9, 0x04EA, 0x04EB, 0x04EC, 0x04ED, 0x04EE, 0x04EF,
996 /* F */ 0x04F0, 0x04F1, 0x04F2, 0x04F3, 0x04F4, 0x04F5, 0x04F6, 0x04F7,
997 0x04F8, 0x04F9, 0x04FA, 0x04FB, 0x04FC, 0x04FD, 0x04FE, 0x04FF,
998
999 // Table 5 (for high byte 0x05)
1000
1001 /* 0 */ 0x0500, 0x0501, 0x0502, 0x0503, 0x0504, 0x0505, 0x0506, 0x0507,
1002 0x0508, 0x0509, 0x050A, 0x050B, 0x050C, 0x050D, 0x050E, 0x050F,
1003 /* 1 */ 0x0510, 0x0511, 0x0512, 0x0513, 0x0514, 0x0515, 0x0516, 0x0517,
1004 0x0518, 0x0519, 0x051A, 0x051B, 0x051C, 0x051D, 0x051E, 0x051F,
1005 /* 2 */ 0x0520, 0x0521, 0x0522, 0x0523, 0x0524, 0x0525, 0x0526, 0x0527,
1006 0x0528, 0x0529, 0x052A, 0x052B, 0x052C, 0x052D, 0x052E, 0x052F,
1007 /* 3 */ 0x0530, 0x0561, 0x0562, 0x0563, 0x0564, 0x0565, 0x0566, 0x0567,
1008 0x0568, 0x0569, 0x056A, 0x056B, 0x056C, 0x056D, 0x056E, 0x056F,
1009 /* 4 */ 0x0570, 0x0571, 0x0572, 0x0573, 0x0574, 0x0575, 0x0576, 0x0577,
1010 0x0578, 0x0579, 0x057A, 0x057B, 0x057C, 0x057D, 0x057E, 0x057F,
1011 /* 5 */ 0x0580, 0x0581, 0x0582, 0x0583, 0x0584, 0x0585, 0x0586, 0x0557,
1012 0x0558, 0x0559, 0x055A, 0x055B, 0x055C, 0x055D, 0x055E, 0x055F,
1013 /* 6 */ 0x0560, 0x0561, 0x0562, 0x0563, 0x0564, 0x0565, 0x0566, 0x0567,
1014 0x0568, 0x0569, 0x056A, 0x056B, 0x056C, 0x056D, 0x056E, 0x056F,
1015 /* 7 */ 0x0570, 0x0571, 0x0572, 0x0573, 0x0574, 0x0575, 0x0576, 0x0577,
1016 0x0578, 0x0579, 0x057A, 0x057B, 0x057C, 0x057D, 0x057E, 0x057F,
1017 /* 8 */ 0x0580, 0x0581, 0x0582, 0x0583, 0x0584, 0x0585, 0x0586, 0x0587,
1018 0x0588, 0x0589, 0x058A, 0x058B, 0x058C, 0x058D, 0x058E, 0x058F,
1019 /* 9 */ 0x0590, 0x0591, 0x0592, 0x0593, 0x0594, 0x0595, 0x0596, 0x0597,
1020 0x0598, 0x0599, 0x059A, 0x059B, 0x059C, 0x059D, 0x059E, 0x059F,
1021 /* A */ 0x05A0, 0x05A1, 0x05A2, 0x05A3, 0x05A4, 0x05A5, 0x05A6, 0x05A7,
1022 0x05A8, 0x05A9, 0x05AA, 0x05AB, 0x05AC, 0x05AD, 0x05AE, 0x05AF,
1023 /* B */ 0x05B0, 0x05B1, 0x05B2, 0x05B3, 0x05B4, 0x05B5, 0x05B6, 0x05B7,
1024 0x05B8, 0x05B9, 0x05BA, 0x05BB, 0x05BC, 0x05BD, 0x05BE, 0x05BF,
1025 /* C */ 0x05C0, 0x05C1, 0x05C2, 0x05C3, 0x05C4, 0x05C5, 0x05C6, 0x05C7,
1026 0x05C8, 0x05C9, 0x05CA, 0x05CB, 0x05CC, 0x05CD, 0x05CE, 0x05CF,
1027 /* D */ 0x05D0, 0x05D1, 0x05D2, 0x05D3, 0x05D4, 0x05D5, 0x05D6, 0x05D7,
1028 0x05D8, 0x05D9, 0x05DA, 0x05DB, 0x05DC, 0x05DD, 0x05DE, 0x05DF,
1029 /* E */ 0x05E0, 0x05E1, 0x05E2, 0x05E3, 0x05E4, 0x05E5, 0x05E6, 0x05E7,
1030 0x05E8, 0x05E9, 0x05EA, 0x05EB, 0x05EC, 0x05ED, 0x05EE, 0x05EF,
1031 /* F */ 0x05F0, 0x05F1, 0x05F2, 0x05F3, 0x05F4, 0x05F5, 0x05F6, 0x05F7,
1032 0x05F8, 0x05F9, 0x05FA, 0x05FB, 0x05FC, 0x05FD, 0x05FE, 0x05FF,
1033
1034 // Table 6 (for high byte 0x10)
1035
1036 /* 0 */ 0x1000, 0x1001, 0x1002, 0x1003, 0x1004, 0x1005, 0x1006, 0x1007,
1037 0x1008, 0x1009, 0x100A, 0x100B, 0x100C, 0x100D, 0x100E, 0x100F,
1038 /* 1 */ 0x1010, 0x1011, 0x1012, 0x1013, 0x1014, 0x1015, 0x1016, 0x1017,
1039 0x1018, 0x1019, 0x101A, 0x101B, 0x101C, 0x101D, 0x101E, 0x101F,
1040 /* 2 */ 0x1020, 0x1021, 0x1022, 0x1023, 0x1024, 0x1025, 0x1026, 0x1027,
1041 0x1028, 0x1029, 0x102A, 0x102B, 0x102C, 0x102D, 0x102E, 0x102F,
1042 /* 3 */ 0x1030, 0x1031, 0x1032, 0x1033, 0x1034, 0x1035, 0x1036, 0x1037,
1043 0x1038, 0x1039, 0x103A, 0x103B, 0x103C, 0x103D, 0x103E, 0x103F,
1044 /* 4 */ 0x1040, 0x1041, 0x1042, 0x1043, 0x1044, 0x1045, 0x1046, 0x1047,
1045 0x1048, 0x1049, 0x104A, 0x104B, 0x104C, 0x104D, 0x104E, 0x104F,
1046 /* 5 */ 0x1050, 0x1051, 0x1052, 0x1053, 0x1054, 0x1055, 0x1056, 0x1057,
1047 0x1058, 0x1059, 0x105A, 0x105B, 0x105C, 0x105D, 0x105E, 0x105F,
1048 /* 6 */ 0x1060, 0x1061, 0x1062, 0x1063, 0x1064, 0x1065, 0x1066, 0x1067,
1049 0x1068, 0x1069, 0x106A, 0x106B, 0x106C, 0x106D, 0x106E, 0x106F,
1050 /* 7 */ 0x1070, 0x1071, 0x1072, 0x1073, 0x1074, 0x1075, 0x1076, 0x1077,
1051 0x1078, 0x1079, 0x107A, 0x107B, 0x107C, 0x107D, 0x107E, 0x107F,
1052 /* 8 */ 0x1080, 0x1081, 0x1082, 0x1083, 0x1084, 0x1085, 0x1086, 0x1087,
1053 0x1088, 0x1089, 0x108A, 0x108B, 0x108C, 0x108D, 0x108E, 0x108F,
1054 /* 9 */ 0x1090, 0x1091, 0x1092, 0x1093, 0x1094, 0x1095, 0x1096, 0x1097,
1055 0x1098, 0x1099, 0x109A, 0x109B, 0x109C, 0x109D, 0x109E, 0x109F,
1056 /* A */ 0x10D0, 0x10D1, 0x10D2, 0x10D3, 0x10D4, 0x10D5, 0x10D6, 0x10D7,
1057 0x10D8, 0x10D9, 0x10DA, 0x10DB, 0x10DC, 0x10DD, 0x10DE, 0x10DF,
1058 /* B */ 0x10E0, 0x10E1, 0x10E2, 0x10E3, 0x10E4, 0x10E5, 0x10E6, 0x10E7,
1059 0x10E8, 0x10E9, 0x10EA, 0x10EB, 0x10EC, 0x10ED, 0x10EE, 0x10EF,
1060 /* C */ 0x10F0, 0x10F1, 0x10F2, 0x10F3, 0x10F4, 0x10F5, 0x10C6, 0x10C7,
1061 0x10C8, 0x10C9, 0x10CA, 0x10CB, 0x10CC, 0x10CD, 0x10CE, 0x10CF,
1062 /* D */ 0x10D0, 0x10D1, 0x10D2, 0x10D3, 0x10D4, 0x10D5, 0x10D6, 0x10D7,
1063 0x10D8, 0x10D9, 0x10DA, 0x10DB, 0x10DC, 0x10DD, 0x10DE, 0x10DF,
1064 /* E */ 0x10E0, 0x10E1, 0x10E2, 0x10E3, 0x10E4, 0x10E5, 0x10E6, 0x10E7,
1065 0x10E8, 0x10E9, 0x10EA, 0x10EB, 0x10EC, 0x10ED, 0x10EE, 0x10EF,
1066 /* F */ 0x10F0, 0x10F1, 0x10F2, 0x10F3, 0x10F4, 0x10F5, 0x10F6, 0x10F7,
1067 0x10F8, 0x10F9, 0x10FA, 0x10FB, 0x10FC, 0x10FD, 0x10FE, 0x10FF,
1068
1069 // Table 7 (for high byte 0x20)
1070
1071 /* 0 */ 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007,
1072 0x2008, 0x2009, 0x200A, 0x200B, 0x0000, 0x0000, 0x0000, 0x0000,
1073 /* 1 */ 0x2010, 0x2011, 0x2012, 0x2013, 0x2014, 0x2015, 0x2016, 0x2017,
1074 0x2018, 0x2019, 0x201A, 0x201B, 0x201C, 0x201D, 0x201E, 0x201F,
1075 /* 2 */ 0x2020, 0x2021, 0x2022, 0x2023, 0x2024, 0x2025, 0x2026, 0x2027,
1076 0x2028, 0x2029, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x202F,
1077 /* 3 */ 0x2030, 0x2031, 0x2032, 0x2033, 0x2034, 0x2035, 0x2036, 0x2037,
1078 0x2038, 0x2039, 0x203A, 0x203B, 0x203C, 0x203D, 0x203E, 0x203F,
1079 /* 4 */ 0x2040, 0x2041, 0x2042, 0x2043, 0x2044, 0x2045, 0x2046, 0x2047,
1080 0x2048, 0x2049, 0x204A, 0x204B, 0x204C, 0x204D, 0x204E, 0x204F,
1081 /* 5 */ 0x2050, 0x2051, 0x2052, 0x2053, 0x2054, 0x2055, 0x2056, 0x2057,
1082 0x2058, 0x2059, 0x205A, 0x205B, 0x205C, 0x205D, 0x205E, 0x205F,
1083 /* 6 */ 0x2060, 0x2061, 0x2062, 0x2063, 0x2064, 0x2065, 0x2066, 0x2067,
1084 0x2068, 0x2069, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
1085 /* 7 */ 0x2070, 0x2071, 0x2072, 0x2073, 0x2074, 0x2075, 0x2076, 0x2077,
1086 0x2078, 0x2079, 0x207A, 0x207B, 0x207C, 0x207D, 0x207E, 0x207F,
1087 /* 8 */ 0x2080, 0x2081, 0x2082, 0x2083, 0x2084, 0x2085, 0x2086, 0x2087,
1088 0x2088, 0x2089, 0x208A, 0x208B, 0x208C, 0x208D, 0x208E, 0x208F,
1089 /* 9 */ 0x2090, 0x2091, 0x2092, 0x2093, 0x2094, 0x2095, 0x2096, 0x2097,
1090 0x2098, 0x2099, 0x209A, 0x209B, 0x209C, 0x209D, 0x209E, 0x209F,
1091 /* A */ 0x20A0, 0x20A1, 0x20A2, 0x20A3, 0x20A4, 0x20A5, 0x20A6, 0x20A7,
1092 0x20A8, 0x20A9, 0x20AA, 0x20AB, 0x20AC, 0x20AD, 0x20AE, 0x20AF,
1093 /* B */ 0x20B0, 0x20B1, 0x20B2, 0x20B3, 0x20B4, 0x20B5, 0x20B6, 0x20B7,
1094 0x20B8, 0x20B9, 0x20BA, 0x20BB, 0x20BC, 0x20BD, 0x20BE, 0x20BF,
1095 /* C */ 0x20C0, 0x20C1, 0x20C2, 0x20C3, 0x20C4, 0x20C5, 0x20C6, 0x20C7,
1096 0x20C8, 0x20C9, 0x20CA, 0x20CB, 0x20CC, 0x20CD, 0x20CE, 0x20CF,
1097 /* D */ 0x20D0, 0x20D1, 0x20D2, 0x20D3, 0x20D4, 0x20D5, 0x20D6, 0x20D7,
1098 0x20D8, 0x20D9, 0x20DA, 0x20DB, 0x20DC, 0x20DD, 0x20DE, 0x20DF,
1099 /* E */ 0x20E0, 0x20E1, 0x20E2, 0x20E3, 0x20E4, 0x20E5, 0x20E6, 0x20E7,
1100 0x20E8, 0x20E9, 0x20EA, 0x20EB, 0x20EC, 0x20ED, 0x20EE, 0x20EF,
1101 /* F */ 0x20F0, 0x20F1, 0x20F2, 0x20F3, 0x20F4, 0x20F5, 0x20F6, 0x20F7,
1102 0x20F8, 0x20F9, 0x20FA, 0x20FB, 0x20FC, 0x20FD, 0x20FE, 0x20FF,
1103
1104 // Table 8 (for high byte 0x21)
1105
1106 /* 0 */ 0x2100, 0x2101, 0x2102, 0x2103, 0x2104, 0x2105, 0x2106, 0x2107,
1107 0x2108, 0x2109, 0x210A, 0x210B, 0x210C, 0x210D, 0x210E, 0x210F,
1108 /* 1 */ 0x2110, 0x2111, 0x2112, 0x2113, 0x2114, 0x2115, 0x2116, 0x2117,
1109 0x2118, 0x2119, 0x211A, 0x211B, 0x211C, 0x211D, 0x211E, 0x211F,
1110 /* 2 */ 0x2120, 0x2121, 0x2122, 0x2123, 0x2124, 0x2125, 0x2126, 0x2127,
1111 0x2128, 0x2129, 0x212A, 0x212B, 0x212C, 0x212D, 0x212E, 0x212F,
1112 /* 3 */ 0x2130, 0x2131, 0x2132, 0x2133, 0x2134, 0x2135, 0x2136, 0x2137,
1113 0x2138, 0x2139, 0x213A, 0x213B, 0x213C, 0x213D, 0x213E, 0x213F,
1114 /* 4 */ 0x2140, 0x2141, 0x2142, 0x2143, 0x2144, 0x2145, 0x2146, 0x2147,
1115 0x2148, 0x2149, 0x214A, 0x214B, 0x214C, 0x214D, 0x214E, 0x214F,
1116 /* 5 */ 0x2150, 0x2151, 0x2152, 0x2153, 0x2154, 0x2155, 0x2156, 0x2157,
1117 0x2158, 0x2159, 0x215A, 0x215B, 0x215C, 0x215D, 0x215E, 0x215F,
1118 /* 6 */ 0x2170, 0x2171, 0x2172, 0x2173, 0x2174, 0x2175, 0x2176, 0x2177,
1119 0x2178, 0x2179, 0x217A, 0x217B, 0x217C, 0x217D, 0x217E, 0x217F,
1120 /* 7 */ 0x2170, 0x2171, 0x2172, 0x2173, 0x2174, 0x2175, 0x2176, 0x2177,
1121 0x2178, 0x2179, 0x217A, 0x217B, 0x217C, 0x217D, 0x217E, 0x217F,
1122 /* 8 */ 0x2180, 0x2181, 0x2182, 0x2183, 0x2184, 0x2185, 0x2186, 0x2187,
1123 0x2188, 0x2189, 0x218A, 0x218B, 0x218C, 0x218D, 0x218E, 0x218F,
1124 /* 9 */ 0x2190, 0x2191, 0x2192, 0x2193, 0x2194, 0x2195, 0x2196, 0x2197,
1125 0x2198, 0x2199, 0x219A, 0x219B, 0x219C, 0x219D, 0x219E, 0x219F,
1126 /* A */ 0x21A0, 0x21A1, 0x21A2, 0x21A3, 0x21A4, 0x21A5, 0x21A6, 0x21A7,
1127 0x21A8, 0x21A9, 0x21AA, 0x21AB, 0x21AC, 0x21AD, 0x21AE, 0x21AF,
1128 /* B */ 0x21B0, 0x21B1, 0x21B2, 0x21B3, 0x21B4, 0x21B5, 0x21B6, 0x21B7,
1129 0x21B8, 0x21B9, 0x21BA, 0x21BB, 0x21BC, 0x21BD, 0x21BE, 0x21BF,
1130 /* C */ 0x21C0, 0x21C1, 0x21C2, 0x21C3, 0x21C4, 0x21C5, 0x21C6, 0x21C7,
1131 0x21C8, 0x21C9, 0x21CA, 0x21CB, 0x21CC, 0x21CD, 0x21CE, 0x21CF,
1132 /* D */ 0x21D0, 0x21D1, 0x21D2, 0x21D3, 0x21D4, 0x21D5, 0x21D6, 0x21D7,
1133 0x21D8, 0x21D9, 0x21DA, 0x21DB, 0x21DC, 0x21DD, 0x21DE, 0x21DF,
1134 /* E */ 0x21E0, 0x21E1, 0x21E2, 0x21E3, 0x21E4, 0x21E5, 0x21E6, 0x21E7,
1135 0x21E8, 0x21E9, 0x21EA, 0x21EB, 0x21EC, 0x21ED, 0x21EE, 0x21EF,
1136 /* F */ 0x21F0, 0x21F1, 0x21F2, 0x21F3, 0x21F4, 0x21F5, 0x21F6, 0x21F7,
1137 0x21F8, 0x21F9, 0x21FA, 0x21FB, 0x21FC, 0x21FD, 0x21FE, 0x21FF,
1138
1139 // Table 9 (for high byte 0xFE)
1140
1141 /* 0 */ 0xFE00, 0xFE01, 0xFE02, 0xFE03, 0xFE04, 0xFE05, 0xFE06, 0xFE07,
1142 0xFE08, 0xFE09, 0xFE0A, 0xFE0B, 0xFE0C, 0xFE0D, 0xFE0E, 0xFE0F,
1143 /* 1 */ 0xFE10, 0xFE11, 0xFE12, 0xFE13, 0xFE14, 0xFE15, 0xFE16, 0xFE17,
1144 0xFE18, 0xFE19, 0xFE1A, 0xFE1B, 0xFE1C, 0xFE1D, 0xFE1E, 0xFE1F,
1145 /* 2 */ 0xFE20, 0xFE21, 0xFE22, 0xFE23, 0xFE24, 0xFE25, 0xFE26, 0xFE27,
1146 0xFE28, 0xFE29, 0xFE2A, 0xFE2B, 0xFE2C, 0xFE2D, 0xFE2E, 0xFE2F,
1147 /* 3 */ 0xFE30, 0xFE31, 0xFE32, 0xFE33, 0xFE34, 0xFE35, 0xFE36, 0xFE37,
1148 0xFE38, 0xFE39, 0xFE3A, 0xFE3B, 0xFE3C, 0xFE3D, 0xFE3E, 0xFE3F,
1149 /* 4 */ 0xFE40, 0xFE41, 0xFE42, 0xFE43, 0xFE44, 0xFE45, 0xFE46, 0xFE47,
1150 0xFE48, 0xFE49, 0xFE4A, 0xFE4B, 0xFE4C, 0xFE4D, 0xFE4E, 0xFE4F,
1151 /* 5 */ 0xFE50, 0xFE51, 0xFE52, 0xFE53, 0xFE54, 0xFE55, 0xFE56, 0xFE57,
1152 0xFE58, 0xFE59, 0xFE5A, 0xFE5B, 0xFE5C, 0xFE5D, 0xFE5E, 0xFE5F,
1153 /* 6 */ 0xFE60, 0xFE61, 0xFE62, 0xFE63, 0xFE64, 0xFE65, 0xFE66, 0xFE67,
1154 0xFE68, 0xFE69, 0xFE6A, 0xFE6B, 0xFE6C, 0xFE6D, 0xFE6E, 0xFE6F,
1155 /* 7 */ 0xFE70, 0xFE71, 0xFE72, 0xFE73, 0xFE74, 0xFE75, 0xFE76, 0xFE77,
1156 0xFE78, 0xFE79, 0xFE7A, 0xFE7B, 0xFE7C, 0xFE7D, 0xFE7E, 0xFE7F,
1157 /* 8 */ 0xFE80, 0xFE81, 0xFE82, 0xFE83, 0xFE84, 0xFE85, 0xFE86, 0xFE87,
1158 0xFE88, 0xFE89, 0xFE8A, 0xFE8B, 0xFE8C, 0xFE8D, 0xFE8E, 0xFE8F,
1159 /* 9 */ 0xFE90, 0xFE91, 0xFE92, 0xFE93, 0xFE94, 0xFE95, 0xFE96, 0xFE97,
1160 0xFE98, 0xFE99, 0xFE9A, 0xFE9B, 0xFE9C, 0xFE9D, 0xFE9E, 0xFE9F,
1161 /* A */ 0xFEA0, 0xFEA1, 0xFEA2, 0xFEA3, 0xFEA4, 0xFEA5, 0xFEA6, 0xFEA7,
1162 0xFEA8, 0xFEA9, 0xFEAA, 0xFEAB, 0xFEAC, 0xFEAD, 0xFEAE, 0xFEAF,
1163 /* B */ 0xFEB0, 0xFEB1, 0xFEB2, 0xFEB3, 0xFEB4, 0xFEB5, 0xFEB6, 0xFEB7,
1164 0xFEB8, 0xFEB9, 0xFEBA, 0xFEBB, 0xFEBC, 0xFEBD, 0xFEBE, 0xFEBF,
1165 /* C */ 0xFEC0, 0xFEC1, 0xFEC2, 0xFEC3, 0xFEC4, 0xFEC5, 0xFEC6, 0xFEC7,
1166 0xFEC8, 0xFEC9, 0xFECA, 0xFECB, 0xFECC, 0xFECD, 0xFECE, 0xFECF,
1167 /* D */ 0xFED0, 0xFED1, 0xFED2, 0xFED3, 0xFED4, 0xFED5, 0xFED6, 0xFED7,
1168 0xFED8, 0xFED9, 0xFEDA, 0xFEDB, 0xFEDC, 0xFEDD, 0xFEDE, 0xFEDF,
1169 /* E */ 0xFEE0, 0xFEE1, 0xFEE2, 0xFEE3, 0xFEE4, 0xFEE5, 0xFEE6, 0xFEE7,
1170 0xFEE8, 0xFEE9, 0xFEEA, 0xFEEB, 0xFEEC, 0xFEED, 0xFEEE, 0xFEEF,
1171 /* F */ 0xFEF0, 0xFEF1, 0xFEF2, 0xFEF3, 0xFEF4, 0xFEF5, 0xFEF6, 0xFEF7,
1172 0xFEF8, 0xFEF9, 0xFEFA, 0xFEFB, 0xFEFC, 0xFEFD, 0xFEFE, 0x0000,
1173
1174 // Table 10 (for high byte 0xFF)
1175
1176 /* 0 */ 0xFF00, 0xFF01, 0xFF02, 0xFF03, 0xFF04, 0xFF05, 0xFF06, 0xFF07,
1177 0xFF08, 0xFF09, 0xFF0A, 0xFF0B, 0xFF0C, 0xFF0D, 0xFF0E, 0xFF0F,
1178 /* 1 */ 0xFF10, 0xFF11, 0xFF12, 0xFF13, 0xFF14, 0xFF15, 0xFF16, 0xFF17,
1179 0xFF18, 0xFF19, 0xFF1A, 0xFF1B, 0xFF1C, 0xFF1D, 0xFF1E, 0xFF1F,
1180 /* 2 */ 0xFF20, 0xFF41, 0xFF42, 0xFF43, 0xFF44, 0xFF45, 0xFF46, 0xFF47,
1181 0xFF48, 0xFF49, 0xFF4A, 0xFF4B, 0xFF4C, 0xFF4D, 0xFF4E, 0xFF4F,
1182 /* 3 */ 0xFF50, 0xFF51, 0xFF52, 0xFF53, 0xFF54, 0xFF55, 0xFF56, 0xFF57,
1183 0xFF58, 0xFF59, 0xFF5A, 0xFF3B, 0xFF3C, 0xFF3D, 0xFF3E, 0xFF3F,
1184 /* 4 */ 0xFF40, 0xFF41, 0xFF42, 0xFF43, 0xFF44, 0xFF45, 0xFF46, 0xFF47,
1185 0xFF48, 0xFF49, 0xFF4A, 0xFF4B, 0xFF4C, 0xFF4D, 0xFF4E, 0xFF4F,
1186 /* 5 */ 0xFF50, 0xFF51, 0xFF52, 0xFF53, 0xFF54, 0xFF55, 0xFF56, 0xFF57,
1187 0xFF58, 0xFF59, 0xFF5A, 0xFF5B, 0xFF5C, 0xFF5D, 0xFF5E, 0xFF5F,
1188 /* 6 */ 0xFF60, 0xFF61, 0xFF62, 0xFF63, 0xFF64, 0xFF65, 0xFF66, 0xFF67,
1189 0xFF68, 0xFF69, 0xFF6A, 0xFF6B, 0xFF6C, 0xFF6D, 0xFF6E, 0xFF6F,
1190 /* 7 */ 0xFF70, 0xFF71, 0xFF72, 0xFF73, 0xFF74, 0xFF75, 0xFF76, 0xFF77,
1191 0xFF78, 0xFF79, 0xFF7A, 0xFF7B, 0xFF7C, 0xFF7D, 0xFF7E, 0xFF7F,
1192 /* 8 */ 0xFF80, 0xFF81, 0xFF82, 0xFF83, 0xFF84, 0xFF85, 0xFF86, 0xFF87,
1193 0xFF88, 0xFF89, 0xFF8A, 0xFF8B, 0xFF8C, 0xFF8D, 0xFF8E, 0xFF8F,
1194 /* 9 */ 0xFF90, 0xFF91, 0xFF92, 0xFF93, 0xFF94, 0xFF95, 0xFF96, 0xFF97,
1195 0xFF98, 0xFF99, 0xFF9A, 0xFF9B, 0xFF9C, 0xFF9D, 0xFF9E, 0xFF9F,
1196 /* A */ 0xFFA0, 0xFFA1, 0xFFA2, 0xFFA3, 0xFFA4, 0xFFA5, 0xFFA6, 0xFFA7,
1197 0xFFA8, 0xFFA9, 0xFFAA, 0xFFAB, 0xFFAC, 0xFFAD, 0xFFAE, 0xFFAF,
1198 /* B */ 0xFFB0, 0xFFB1, 0xFFB2, 0xFFB3, 0xFFB4, 0xFFB5, 0xFFB6, 0xFFB7,
1199 0xFFB8, 0xFFB9, 0xFFBA, 0xFFBB, 0xFFBC, 0xFFBD, 0xFFBE, 0xFFBF,
1200 /* C */ 0xFFC0, 0xFFC1, 0xFFC2, 0xFFC3, 0xFFC4, 0xFFC5, 0xFFC6, 0xFFC7,
1201 0xFFC8, 0xFFC9, 0xFFCA, 0xFFCB, 0xFFCC, 0xFFCD, 0xFFCE, 0xFFCF,
1202 /* D */ 0xFFD0, 0xFFD1, 0xFFD2, 0xFFD3, 0xFFD4, 0xFFD5, 0xFFD6, 0xFFD7,
1203 0xFFD8, 0xFFD9, 0xFFDA, 0xFFDB, 0xFFDC, 0xFFDD, 0xFFDE, 0xFFDF,
1204 /* E */ 0xFFE0, 0xFFE1, 0xFFE2, 0xFFE3, 0xFFE4, 0xFFE5, 0xFFE6, 0xFFE7,
1205 0xFFE8, 0xFFE9, 0xFFEA, 0xFFEB, 0xFFEC, 0xFFED, 0xFFEE, 0xFFEF,
1206 /* F */ 0xFFF0, 0xFFF1, 0xFFF2, 0xFFF3, 0xFFF4, 0xFFF5, 0xFFF6, 0xFFF7,
1207 0xFFF8, 0xFFF9, 0xFFFA, 0xFFFB, 0xFFFC, 0xFFFD, 0xFFFE, 0xFFFF,
1208 };
1209 // clang-format on
1210
1211 // Returns the next non-ignorable codepoint within `string` starting from the
1212 // position indicated by `index`, or zero if there are no more.
1213 // The passed-in `index` is automatically advanced as the characters in the
1214 // input HFS-decomposed UTF-8 strings are read.
HFSReadNextNonIgnorableCodepoint(const char * string,size_t length,size_t * index)1215 inline base_icu::UChar32 HFSReadNextNonIgnorableCodepoint(const char* string,
1216 size_t length,
1217 size_t* index) {
1218 base_icu::UChar32 codepoint = 0;
1219 while (*index < length && codepoint == 0) {
1220 // CBU8_NEXT returns a value < 0 in error cases. For purposes of string
1221 // comparison, we just use that value and flag it with DCHECK.
1222 CBU8_NEXT(reinterpret_cast<const uint8_t*>(string), *index, length,
1223 codepoint);
1224 DCHECK_GT(codepoint, 0);
1225
1226 // Note: Here, there are no lower case conversion implemented in the
1227 // Supplementary Multilingual Plane (codepoint > 0xFFFF).
1228
1229 if (codepoint > 0 && codepoint <= 0xFFFF) {
1230 // Check if there is a subtable for this upper byte.
1231 int lookup_offset = lower_case_table[codepoint >> 8];
1232 if (lookup_offset != 0)
1233 codepoint = lower_case_table[lookup_offset + (codepoint & 0x00FF)];
1234 // Note: `codepoint` may be again 0 at this point if the character was
1235 // an ignorable.
1236 }
1237 }
1238 return codepoint;
1239 }
1240
1241 } // namespace
1242
1243 // Special UTF-8 version of FastUnicodeCompare. Cf:
1244 // http://developer.apple.com/mac/library/technotes/tn/tn1150.html#StringComparisonAlgorithm
1245 // The input strings must be in the special HFS decomposed form.
HFSFastUnicodeCompare(StringPieceType string1,StringPieceType string2)1246 int FilePath::HFSFastUnicodeCompare(StringPieceType string1,
1247 StringPieceType string2) {
1248 size_t length1 = string1.length();
1249 size_t length2 = string2.length();
1250 size_t index1 = 0;
1251 size_t index2 = 0;
1252
1253 for (;;) {
1254 base_icu::UChar32 codepoint1 =
1255 HFSReadNextNonIgnorableCodepoint(string1.data(), length1, &index1);
1256 base_icu::UChar32 codepoint2 =
1257 HFSReadNextNonIgnorableCodepoint(string2.data(), length2, &index2);
1258 if (codepoint1 != codepoint2)
1259 return (codepoint1 < codepoint2) ? -1 : 1;
1260 if (codepoint1 == 0) {
1261 DCHECK_EQ(index1, length1);
1262 DCHECK_EQ(index2, length2);
1263 return 0;
1264 }
1265 }
1266 }
1267
GetHFSDecomposedForm(StringPieceType string)1268 StringType FilePath::GetHFSDecomposedForm(StringPieceType string) {
1269 StringType result;
1270 ScopedCFTypeRef<CFStringRef> cfstring(CFStringCreateWithBytesNoCopy(
1271 NULL, reinterpret_cast<const UInt8*>(string.data()),
1272 checked_cast<CFIndex>(string.length()), kCFStringEncodingUTF8, false,
1273 kCFAllocatorNull));
1274 if (cfstring) {
1275 // Query the maximum length needed to store the result. In most cases this
1276 // will overestimate the required space. The return value also already
1277 // includes the space needed for a terminating 0.
1278 CFIndex length = CFStringGetMaximumSizeOfFileSystemRepresentation(cfstring);
1279 DCHECK_GT(length, 0); // should be at least 1 for the 0-terminator.
1280 // Reserve enough space for CFStringGetFileSystemRepresentation to write
1281 // into. Also set the length to the maximum so that we can shrink it later.
1282 // (Increasing rather than decreasing it would clobber the string contents!)
1283 result.reserve(static_cast<size_t>(length));
1284 result.resize(static_cast<size_t>(length) - 1);
1285 Boolean success = CFStringGetFileSystemRepresentation(cfstring,
1286 &result[0],
1287 length);
1288 if (success) {
1289 // Reduce result.length() to actual string length.
1290 result.resize(strlen(result.c_str()));
1291 } else {
1292 // An error occurred -> clear result.
1293 result.clear();
1294 }
1295 }
1296 return result;
1297 }
1298
CompareIgnoreCase(StringPieceType string1,StringPieceType string2)1299 int FilePath::CompareIgnoreCase(StringPieceType string1,
1300 StringPieceType string2) {
1301 // Quick checks for empty strings - these speed things up a bit and make the
1302 // following code cleaner.
1303 if (string1.empty())
1304 return string2.empty() ? 0 : -1;
1305 if (string2.empty())
1306 return 1;
1307
1308 StringType hfs1 = GetHFSDecomposedForm(string1);
1309 StringType hfs2 = GetHFSDecomposedForm(string2);
1310
1311 // GetHFSDecomposedForm() returns an empty string in an error case.
1312 if (hfs1.empty() || hfs2.empty()) {
1313 ScopedCFTypeRef<CFStringRef> cfstring1(CFStringCreateWithBytesNoCopy(
1314 NULL, reinterpret_cast<const UInt8*>(string1.data()),
1315 checked_cast<CFIndex>(string1.length()), kCFStringEncodingUTF8, false,
1316 kCFAllocatorNull));
1317 ScopedCFTypeRef<CFStringRef> cfstring2(CFStringCreateWithBytesNoCopy(
1318 NULL, reinterpret_cast<const UInt8*>(string2.data()),
1319 checked_cast<CFIndex>(string2.length()), kCFStringEncodingUTF8, false,
1320 kCFAllocatorNull));
1321 // If neither GetHFSDecomposedForm nor CFStringCreateWithBytesNoCopy
1322 // succeed, fall back to strcmp. This can occur when the input string is
1323 // invalid UTF-8.
1324 if (!cfstring1 || !cfstring2) {
1325 int comparison = memcmp(string1.data(), string2.data(),
1326 std::min(string1.length(), string2.length()));
1327 if (comparison < 0)
1328 return -1;
1329 if (comparison > 0)
1330 return 1;
1331 return 0;
1332 }
1333
1334 return static_cast<int>(
1335 CFStringCompare(cfstring1, cfstring2, kCFCompareCaseInsensitive));
1336 }
1337
1338 return HFSFastUnicodeCompare(hfs1, hfs2);
1339 }
1340
1341 #elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
1342
1343 // Generic Posix system comparisons.
CompareIgnoreCase(StringPieceType string1,StringPieceType string2)1344 int FilePath::CompareIgnoreCase(StringPieceType string1,
1345 StringPieceType string2) {
1346 size_t rlen = std::min(string1.size(), string2.size());
1347 int comparison = strncasecmp(string1.data(), string2.data(), rlen);
1348 if (comparison < 0 || (comparison == 0 && string1.size() < string2.size()))
1349 return -1;
1350 if (comparison > 0 || (comparison == 0 && string1.size() > string2.size()))
1351 return 1;
1352 return 0;
1353 }
1354
1355 #endif // OS versions of CompareIgnoreCase()
1356
1357
StripTrailingSeparatorsInternal()1358 void FilePath::StripTrailingSeparatorsInternal() {
1359 // If there is no drive letter, start will be 1, which will prevent stripping
1360 // the leading separator if there is only one separator. If there is a drive
1361 // letter, start will be set appropriately to prevent stripping the first
1362 // separator following the drive letter, if a separator immediately follows
1363 // the drive letter.
1364 StringType::size_type start = FindDriveLetter(path_) + 2;
1365
1366 StringType::size_type last_stripped = StringType::npos;
1367 for (StringType::size_type pos = path_.length();
1368 pos > start && IsSeparator(path_[pos - 1]);
1369 --pos) {
1370 // If the string only has two separators and they're at the beginning,
1371 // don't strip them, unless the string began with more than two separators.
1372 if (pos != start + 1 || last_stripped == start + 2 ||
1373 !IsSeparator(path_[start - 1])) {
1374 path_.resize(pos - 1);
1375 last_stripped = pos;
1376 }
1377 }
1378 }
1379
NormalizePathSeparators() const1380 FilePath FilePath::NormalizePathSeparators() const {
1381 return NormalizePathSeparatorsTo(kSeparators[0]);
1382 }
1383
WriteIntoTrace(perfetto::TracedValue context) const1384 void FilePath::WriteIntoTrace(perfetto::TracedValue context) const {
1385 perfetto::WriteIntoTracedValue(std::move(context), value());
1386 }
1387
NormalizePathSeparatorsTo(CharType separator) const1388 FilePath FilePath::NormalizePathSeparatorsTo(CharType separator) const {
1389 #if defined(FILE_PATH_USES_WIN_SEPARATORS)
1390 DCHECK_NE(kSeparators + kSeparatorsLength,
1391 std::find(kSeparators, kSeparators + kSeparatorsLength, separator));
1392 StringType copy = path_;
1393 for (size_t i = 0; i < kSeparatorsLength; ++i) {
1394 std::replace(copy.begin(), copy.end(), kSeparators[i], separator);
1395 }
1396 return FilePath(copy);
1397 #else
1398 return *this;
1399 #endif
1400 }
1401
1402 #if BUILDFLAG(IS_ANDROID)
IsContentUri() const1403 bool FilePath::IsContentUri() const {
1404 return StartsWith(path_, "content://", base::CompareCase::INSENSITIVE_ASCII);
1405 }
1406 #endif
1407
1408 } // namespace base
1409